Y
在driver_adc.h中,有说明:
USAGE SAMPLE
1. get vbat value
struct adc_cfg_t cfg;
uint16_t result, ref_vol;
memset((void*)&cfg, 0, sizeof(cfg));
cfg.src = ADC_TRANS_SOURCE_VBAT;
cfg.ref_sel = ADC_REFERENCE_INTERNAL;
cfg.int_ref_cfg = ADC_INTERNAL_REF_1_2;
cfg.clk_sel = ADC_SAMPLE_CLK_24M_DIV13;
cfg.clk_div = 0x3f;
adc_init(&cfg);
adc_enable(NULL, NULL, 0);
adc_get_result(ADC_TRANS_SOURCE_VBAT, 0, &result);
ref_vol = adc_get_ref_voltage(ADC_REFERENCE_INTERNAL);
// vbat_vol = (result * 4 * ref_vol) / 1024 mV.